CVE-2025-60308 identifies a Cross Site Scripting (XSS) vulnerability in the Simple Online Hotel Reservation System version 1.0, specifically within the Add Room functionality. This vulnerability arises because the Description field does not properly sanitize or encode user input, allowing an attacker to inject arbitrary JavaScript code. When an administrator or authorized user views the room details containing the malicious script, the code executes in their browser context. This execution can lead to the theft of sensitive session cookies, enabling attackers to hijack administrative sessions and gain unauthorized access to the system. The vulnerability affects the confidentiality and integrity of the system by compromising administrative credentials and potentially allowing further unauthorized actions. No CVSS score has been assigned yet, and no public exploits have been reported, but the vulnerability is publicly disclosed and should be considered a significant risk. The lack of patches or updates at this time means organizations must rely on manual mitigations such as input validation and output encoding. The threat is particularly relevant to organizations in the hospitality sector using this specific software, which may be more common in European countries with large tourism industries. The attack vector requires the attacker to inject malicious input and for an administrator to view the compromised data, meaning user interaction is necessary but no authentication bypass is required beyond the administrator’s session. This vulnerability highlights the importance of secure coding practices and timely patching in web applications handling sensitive administrative functions.

The primary impact of CVE-2025-60308 is the compromise of administrator session cookies through XSS, which can lead to session hijacking and unauthorized administrative access. For European organizations, especially those in the hospitality and tourism sectors using the affected software, this could result in unauthorized changes to booking data, exposure of sensitive customer information, and disruption of hotel reservation operations. The breach of administrative control could also facilitate further attacks, including data exfiltration or insertion of malicious content affecting customers. Given the role of hotel reservation systems in managing personal and payment data, the confidentiality and integrity of customer data are at risk. Additionally, reputational damage and regulatory consequences under GDPR could arise from such incidents. The lack of known exploits currently reduces immediate risk, but the public disclosure increases the likelihood of future exploitation attempts. The vulnerability’s impact on availability is limited but could occur if attackers modify or delete reservation data. Overall, the threat poses a significant risk to affected organizations’ operational security and data privacy.

To mitigate CVE-2025-60308, organizations should implement strict input validation and output encoding on all user-supplied data, particularly in the Add Room Description field, to prevent injection of malicious scripts. Employing Content Security Policy (CSP) headers can help restrict the execution of unauthorized scripts in the browser. Until an official patch or update is released by the software vendor, administrators should limit access to the affected system and monitor for suspicious activity. Conduct regular security audits and penetration tests focusing on XSS vulnerabilities. Educate administrators about the risks of clicking on untrusted links or viewing unverified input in the system. If possible, isolate the hotel reservation system within a segmented network to reduce lateral movement in case of compromise. Implement multi-factor authentication (MFA) for administrative accounts to reduce the impact of stolen session cookies. Finally, maintain up-to-date backups of reservation data to enable recovery in case of data tampering or loss.